Unkillable space marine clones in dow2: Retribution

Like the title says, when you play Last stand, you reach the wave where clones of your heroes appear. However my clones(due to my loadout) where unkillable.
The loadout consists out of:
Left:Inscribed Combat Shield Right: Master-crafted Chainsword
Armour: Armour of Vengeance
Accessories: Jump Pack, Rite of Fortitude, Parable of the Stalwart Brother
Commander Item: Laramann's Blessing.
Anyone ever had the same experience?